Prior to October 2013, customers signing up for Bing Ads created a user name to sign in with. Customers who signed up after October 2013 have been required to use an email address (Microsoft account) to sign in to Bing Ads. Although we are encouraging everyone to take advantage of the benefits of signing in with an email address that can be used with all Microsoft products, some of you might still be signing in with your Bing Ads user name and password. Occasionally, you’ll be reminded to make the transition. Don’t wait! At some point, signing in with an email address will be required for all users. You can use most email addresses (for example, Outlook, Yahoo, Gmail) and you’ll be able to use the one you choose to sign in to other Microsoft products (for example, Office365, Skype, and OneDrive).

When you go to the Bing Ads sign-in page, you'll see both sign in options:

Optionally, select the Keep me signed in checkbox if you want to stay signed in to Bing Ads and other Microsoft products that use this email address and password.

Notes

Because your email address can be used to sign in to other Microsoft products, we do not recommend sharing your email address with others so that they can sign in to Bing Ads. For more information on how multiple users can share access to Bing Ads, see How do I give someone access to my Bing Ads account?

If you are already signed in to another Microsoft product with the email address you use to sign in to Bing Ads, you will go directly to your Bing Ads account without signing in again.

If you sign out of Bing Ads, you will be signed out of any other Microsoft product that you are currently signed in to.

You cannot use the same email address to sign in to both Bing Ads and pubCenter.